import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

const router = new VueRouter({
    routes: [
        { path: '/', redirect: '/login' },
        {
            path: '/login',
            component: Login
        }, {
            path: '/home',
            component: Home,
            redirect: '/welcome',
            children: [{
                path: '/welcome',
                component: Welcome,
            }, {
                path: '/users',
                component: Users
            }]
        }
    ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 代表哪个路径跳转而来
    // next 是一个函数 表示放行
    // next() 放行  next('/login') 强制跳转
    if (to.path === '/login') return next()
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})

export default router